MITSUBISHI ELECTRIC APRICOT 340 - Manual (Page 102)

I n s i d e t h e S y s t e m U n i t
APRICOT 340 OWNER’S HANDBOOK A/1
A INSIDE THE SYSTEM UNIT
This appendix provides step-by-step instructions on obtaining access
to the inside of the system unit for the purposes of maintaining or
upgrading the system. Details of all relevant motherboard jumper
settings are included.
Warning
Turn off the computer and unplug all power cords before removing the top
cover.
Anti-static precautions
Static electricity can cause permanent damage to electronic
components. You should be aware of this risk, and take precautions
against the discharge of static electricity into the computer.
Anyone can generate static electricity by moving on a chair,
brushing against desks or walls, or simply walking across an
ordinary carpet. Items handed from one person to another, or being
wrapped or unwrapped, can acquire a static charge. Air conditioning
systems can also result in ambient static. Clothing made of synthetic
fibres is particularly likely to generate static electricity; this static
electricity is often completely unnoticed by the wearer, but can be
sufficient to cripple or impair an electronic component.
The computer is at risk from static discharge while the top cover is
off. This is because the electronic components of the motherboard
are exposed. Memory modules, cache upgrades and OverDrive
processors are other examples of electrostatic sensitive devices
(ESSDs).
All work that involves removing the cover must be done in an area
completely free of static electricity. We recommend using a Special
Handling Area (SHA) as defined by EN 100015-1: 1992. This
means that working surfaces, floor coverings and chairs must be
connected to a common earth reference point, and you should wear
an earthed wrist strap and anti-static clothing. It is also a good idea
to use an ionizer or humidifier to remove static from the air.